AC Dielectrophoresis Using Elliptic Electrode Geometry. (24th May 2011)

• Record Type: Journal Article
• Authors: Hasan, S. M. Rezaul; Khurma, Aanan
• Other Names: Kalantar-Zadeh K. Academic Editor.
• Is Part Of: Journal of sensors. Volume 2011(2011)
• Publication Date: 2011-05-24
• Subjects: Detectors -- Periodicals; 681.205
• DOI: 10.1155/2011/204767
• Languages: English
• ISSNs: 1687-725X

Abstract

Abstract : This paper presents negative AC dielectrophoretic investigations using elliptic electrode geometry. Simulations of the electric field gradient variation using various ratios of the semimajor and the semiminor axis were carried out to determine the optimum elliptic geometry for the dielectrophoretic electrokinetics of specimen in an assay with laminar (low Reynolds number) fluid flow. Experimental setup of the elliptic electrode assembly using PCB fabrication and electrokinetic accumulation of specimen in a dielectrophoretic cage is also being reported. Using an actuating signal between 1 kHz and 1 MHz, successful trapping of 45 μ m polystyrene beads suspended in distilled water was demonstrated due to negative dielectrophoresis near 100 kHz using the novel elliptic electrode.